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DERIVATIVES (Details 2) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Gross and net fair values of outstanding derivatives (in millions)
Total gross and net fair value, asset	$ 30.0us-gaap_DerivativeAssets	$ 24.0us-gaap_DerivativeAssets
Total gross and net fair value, liability	(4)us-gaap_DerivativeLiabilities
Commodity Contracts \| Other current assets
Gross and net fair values of outstanding derivatives (in millions)
Commodity contract derivative asset, gross	30
Commodity Contracts \| Accrued liabilities
Gross and net fair values of outstanding derivatives (in millions)
Commodity contract derivative liability, gross	$ (4)

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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